Underwater video monitoring of fish passage in the Mekong River at Sadam Channel, Khone Falls, Laos

2018 ◽  
Vol 34 (3) ◽  
pp. 232-243 ◽  
Author(s):  
P.R. Hawkins ◽  
K.G. Hortle ◽  
S. Phommanivong ◽  
Y. Singsua
Keyword(s):  
Fish Passage ◽  
Video Monitoring ◽  
Mekong River ◽  
Underwater Video

USING AN EXPERIMENTAL IN SITU FISHWAY TO PROVIDE KEY DESIGN CRITERIA FOR LATERAL FISH PASSAGE IN TROPICAL RIVERS: A CASE STUDY FROM THE MEKONG RIVER, CENTRAL LAO PDR

2011 ◽  
Vol 28 (8) ◽  
pp. 1217-1229 ◽  
Author(s):  
L. J. Baumgartner ◽  
T. Marsden ◽  
D. Singhanouvong ◽  
O. Phonekhampheng ◽  
I. G. Stuart ◽  
...  
Keyword(s):  
Lao Pdr ◽  
Fish Passage ◽  
Mekong River ◽  
Design Criteria ◽  
Tropical Rivers

scholarly journals Underwater observations of seal–fishery interactions and the effectiveness of an exclusion device in reducing bycatch in a midwater trawl fishery

2016 ◽  
Vol 73 (3) ◽  
pp. 436-444 ◽  
Author(s):  
Jeremy M. Lyle ◽  
Simon T. Willcox ◽  
Klaas Hartmann
Keyword(s):  
Mortality Rates ◽  
Video Monitoring ◽  
Underwater Video ◽  
Fishing Activity ◽  
Midwater Trawl ◽  
Trawl Fishery ◽  
Space And Time ◽  
Operational Factor ◽  
Fishery Interactions ◽  
Pelagic Fishery

Interactions between seals and midwater trawl operations in the Australian Small Pelagic Fishery are common and can be lethal. The nature of interactions and effectiveness of a seal exclusion device (SED) in mitigating lethal interactions was assessed using underwater video. Recent fishing activity and the phase of the trawl operation significantly influenced interaction rates; interactions increased with the amount of recent trawl activity and were highest while the trawl was being set. Most seals accessed the trawl via the net entrance and exited via an escape opening located at the base of the SED. The size of the escape opening was the only operational factor that influenced mortality rates — simply enlarging the escape hole reduced lethal interactions by 79%. However, since all deceased seals dropped out of the net before they were brought on board, they would have gone unobserved without video monitoring. Limiting the concentration of fishing activity in space and time and refinement of the SED design, in particular to address dropouts, is recommended if mortality rates are to be reduced.

Underwater Video Monitoring of Groupers and the Associated Hard-Bottom Reef Fish Assemblage of North Carolina

2012 ◽  
Vol 88 (1) ◽  
pp. 15-38 ◽  
Author(s):  
Erin J Burge ◽  
James D Atack ◽  
Craig Andrews ◽  
Benjamin M Binder ◽  
Zachery D Hart ◽  
...  
Keyword(s):  
North Carolina ◽  
Reef Fish ◽  
Fish Assemblage ◽  
Video Monitoring ◽  
Underwater Video ◽  
Reef Fish Assemblage

Perspective: Towards environmentally acceptable criteria for downstream fish passage through mini hydro and irrigation infrastructure in the Lower Mekong River Basin

2014 ◽  
Vol 6 (1) ◽  
pp. 012301 ◽  
Author(s):  
Lee J. Baumgartner ◽  
Z. Daniel Deng ◽  
Garry Thorncraft ◽  
Craig A. Boys ◽  
Richard S. Brown ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Passage ◽  
Mekong River ◽  
Mekong River Basin ◽  
Irrigation Infrastructure

A Computerized Editing System for Video Monitoring of Fish Passage

1998 ◽  
Vol 18 (3) ◽  
pp. 694-699 ◽  
Author(s):  
Douglas R. Hatch ◽  
Jeffery K. Fryer ◽  
Matthew Schwartzberg ◽  
David R. Pederson ◽  
Andrew Wand
Keyword(s):  
Fish Passage ◽  
Video Monitoring
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